<template>
  <div id="app">
    <p>这里是page2</p>
    孩子<input  type="text" v-model="clickevent">
  </div>
</template>
<script>
export default {
  data() {
    return {
    }
  },
  watch: {
    clickevent(newValue,oldValue) {
      this.$emit("SomeEvent",newValue )
    }
  }
}

</script>
